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Search Results: 1 - 10 of 144368 matches for " B. Raei "
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Analysis of Cryogenic Ammonia System for Energy Conservation
B. Raei,F. Shahraki,M. Khorrami,A. Ghadi
Iranica Journal of Energy and Environment (IJEE) , 2010,
Abstract: There are several alternatives to enhance the efficiency of energy usage and to decrease energy losses. Pinch technology is the best method of approach to enhance energy efficiency. Heat exchangers network (HEN) of refrigeration unit of ammonia production process was analyzed to use pinch technology to decrease energy usage. The obtained results showed that pinch technology was unsuccessful for the shaft work targeting capabilities. In contrast, it is posed that for optimization of such systems, one should use the combined pinch and exergy analysis (CPEA) method. In this analysis CPEA method was used in the system. It was observed that the refrigeration system use cold streams for cooling the hot streams. Therefore, retrofitting the refrigeration cycle without changing the main process is impossible. Some suggestions were made for improving the refrigeration system, such as the use of economizer after cooler, multistage cycle and removal of the 111-FFD3 stream. It was also observed that the exchanger 128-E act as an intercooler and the flashed 110-F, 111-F and 112-F act as an economizer. In addition, ammonia refrigerant was used at three different temperatures of -33,-7 and 13.5 C. Also, eliminated the 111-FFD3 stream bring about 2% reduction in exergy loss.
Government Involvement in Corporate Debt Restructuring: Case Studies from the Great Recession  [PDF]
David A. Grigorian, Faezeh Raei
Modern Economy (ME) , 2013, DOI: 10.4236/me.2013.43019

The paper examines recent episodes of government involvement in corporate debt restructurings. It argues that corporate debt restructuring is an important step toward recovery from a financial crisis. Due to interlinkages between the balance sheets of corporations and the financial sector, without an effective corporate debt restructuring, bank lending is likely to remain constrained. We then discuss the rationale for, and modalities of, the state intervention in corporate debt workouts through reviewing six countries with large scale corporate debt workouts. Case studies reveal that the costs of corporate sector rescue are significant and in several cases on par with the costs of financial sector support. The paper sheds light on the importance of contingent liabilities and associated risks to government balance sheet from the corporate debt side and draws conclusions that point to the need for improved surveillance and governance going forward.

Correlation of Minimum Inhibitory Concentration Breakpoints and Methicillin Resistance Gene Carriage in Clinical Isolates of Staphylococcus epidermidis
Fereshteh Eftekhar,,Fereshteh Raei
Iranian Journal of Medical Sciences , 2011,
Abstract: Staphylococcus epidermidis is the most important member of coagulase negative staphylococci responsible for community and hospital acquired infections. Most clinical isolates of S. epidermidis are resistant to methicillin making these infections difficult to treat. In this study, correlation of methicillin resistance phenotype was compared with methicillin resistance (mecA) gene carriage in 55 clinical isolates of S. epidermidis. Susceptibility was measured by disc diffusion using methicillin discs, and minimum inhibitory concentrations (MIC) were measured using broth microdilution. Methicillin resistance gene (MecA gene) carriage was detected by specific primers and PCR. Disc susceptibility results showed 90.9% resistance to methicillin. Considering a MIC of 4 μg/ml, 78.1% of the isolates were methicillin resistant, 76.36% of which carried the mecA gene. On the other hand, when a breakpoint of 0.5 μg/ml was used, 89.09% were methicillin resistant, of which 93.75% were mecA positive. There was a better correlation between MIC of 0.5 μg/ml with disc diffusion results and mecA gene carriage. The findings suggest that despite the usefulness of molecular methods for rapid diagnosis of virulence genes, gene carriage does not necessarily account for virulence phenotype. Ultimately, gene expression, which is controlled by the environment, would determine the outcome
Essential Trace Elements in Hair and Nail Samples of Iranian Malnourished Children
M Raei,S Harbi
Iranian Journal of Pediatrics , 1996,
Portfolio optimization using a hybrid of fuzzy ANP, VIKOR and TOPSIS
Reza Raei,Mohammad Bahrani Jahromi
Management Science Letters , 2012,
Abstract: One of the primary questions in asset management is to find good combinations of different assets and this has been an interesting area of research for over half a century. The proposed model of this paper uses decision makers' feedbacks based on multiple criteria decision making technique to find an appropriate portfolio. We first select some important financial criteria and then using decision makers' opinions and by implementation of some fuzzy network analysis we find appropriate weights of the asset. The proposed model uses two multiple criteria techniques namely TOPSIS and VIKOR and the model is examined for some real-world data from Tehran Stock Exchange. The results of the implementation of the proposed model have been examined against Markowitz traditional model. The preliminary results indicate that the proposed model of this paper performs reasonably well compared with alternative method.
An Intelligent technical analysis using neural network
Reza Raei,Shapour Mohammadi,Mohammad Mehdi Tajik
Management Science Letters , 2011,
Abstract: Technical analysis has been one of the most popular methods for stock market predictions for the past few decades. There have been enormous technical analysis methods to study the behavior of stock market for different kinds of trading markets such as currency, commodity or stock. In this paper, we propose two different methods based on volume adjusted moving average and ease of movement for stock trading. These methods are used with and without generalized regression neural network methods and the results are compared with each other. The preliminary results on historical stock price of 20 firms indicate that there is no meaningful difference between various proposed models of this paper.
Assessing the Ultraviolet Exposure Level in Welding Workers of Sar-Cheshmeh Copper Complex
Javad Vatani,Mehdi Raei,Mohamad Asadi
Zahedan Journal of Research in Medical Sciences , 2013,
Abstract: Background: Because of being exposed to a wide range of ultraviolet radiations, welders are prone to eye and skin diseases. This study aims at determining the ultraviolet exposure level in welding workers of Sar-Cheshmeh Copper Complex.Materials and Methods: This cross-sectional study was conducted in 2010 on all welding workers of the complex using Hagner UV digital radiometer.Results: The mean value for the received ultraviolet radiation level was 0.09±0.045 j2/cm2. The level of UV exposure was significantly different (p=0.001) for the welders working in different units of the complex. The mineworkers received the highest level of radiation (0.14 j2/cm2).Conclusion: In this study, the ultraviolet exposure of welding workers is below the allowable threshold limit for UV radiation.
A Study on Developing of Asset Pricing Models
Reza Raei,Hamed Ahmadinia,Amaneh Hasbaei
International Business Research , 2011, DOI: 10.5539/ibr.v4n4p139
Abstract: This study introduces the development and modifications of the widely used standard capital asset pricing model (CAPM). Many modifications are applied to the model’s challenging financial variables such as: financial risk factors, liquidity risks, downside risks, risk of non expected events, and economic and operational risk factors. Efficiency of the model is increased when applying various challenging financial variables. As a result of the gradual CAPM developments, various new models will present better interpretations of market conditions in economic units and portfolio structure. Furthermore, this study will show the importance of applying the new models advantages and disadvantages for financial managers, financial analysts and investors. po? c.?x ?w vant factors identified in this study showed that lenders took particular interest in risk when dealing with SMEs. This is not out of place, as every business seeks to make profit and thus they need to be sure of recouping their monies when they lend them out to small businesses. It is thus very necessary for SME borrowers to develop an understanding of the decision criteria used by financial institutions in order to increase the probability of getting their loan request approved by fulfilling the required criteria adequately.
Effects of Rhizobial Inoculation, Urea Application and Weed on Growth and Seed Filling Rate in Soybean
Y. Raei,M. Sedghi,R. Seied Sharifi
Journal of Science and Technology of Agriculture and Natural Resources , 2008,
Abstract: A factorial experiment, based on RCB design, with three replications was conducted to evaluate the effects of rhizobial inoculation, urea, and weeds on soybean performance in the field. The factors under study consisted of inoculation and non-inoculation, three levels of 0, 150, and 300 kg/ha urea, and weed-control and weed-infestation. Results showed that weed-control, inoculation and urea application increased biological and seed yield. The highest effect on yield was due to weed control, followed by inoculation and urea application. Inoculation, weed-control and urea application of 300 kg/ha enhanced protein percentage in soybean grains. In this case, inoculation had the highest effect on protein percentage, followed by urea application and weed control. In contrast, only weed-control significantly increased seed oil percentage. Seed filling rate increased as a result of inoculation, but, seed filling duration was not affected by inoculation. Weed-control improved seed filling rate and duration. Urea application induced seed filling duration, but had not any effect on seed filling rate.
Investigating the Effect of Music on Behavior of Apparel Consumers  [PDF]
Soheil Sarmad Saeedi, Ali Abbasi Raei, Javad Faghihi Pour, Mohammad Mehdi
American Journal of Industrial and Business Management (AJIBM) , 2013, DOI: 10.4236/ajibm.2013.33039

Companies aim to win customers loyalty by establishing long-term relationship with them. Relationship Marketing techniques as the marketing execution arms secure the existing customer retention and meet customers’ needs and win their trust through a high quality relationship which eventually leads to their loyalty. Loyal customers, despite environmental factors and advertisement of competitors, tend to repurchase from the firm and guarantee its profitability in today’s turbulent market. This research, following review of the prior research and collecting information from reliable sources, investigates the relationship of music on behavior of apparel consumers in the city of Tehran. In fact, present research seeks to answer the question as whether music exercises any influence in behavior of apparel consumers. The required data were gathered based on the research theoretical framework and through the distribution of 450 questionnaires among apparel buyers and consumers over city of Tehran. From 450 distributed questionnaires, 434 were appropriately filled and used for analysis. Using multivariate linear regression test the research hypotheses were examined. The results indicated that music broadcasting had no significant effect on the amount of time spent for search in attire store by the buyers, and an inverse correlation was found between music playing and the variable tendency repurchase and to recommend the store to others. The results of the regression tables report an adjusted R2 of 0.013, indicating the sum of independent variables explains only 1.3% of the total variance of the dependent variable and the rest of the variance is explained by other factors.

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